Hydrocarbon Wax-containing Adjuvant Patents (Class 430/108.8)
  • Patent number: 11675285
    Abstract: An electrostatic image developing toner includes toner particles containing a binder resin. In a differential scanning calorimetry curve of the toner particles, Tg1 is 58° C. or more and 68° C. or less, and Tg1?Tg2 is 20° C. or more and 40° C. or less, where Tg1 is a lowest onset temperature in an endothermic change during a first temperature increase, and Tg2 is a lowest onset temperature in an endothermic change during a second temperature increase.
    Type: Grant
    Filed: August 20, 2021
    Date of Patent: June 13, 2023
    Assignee: FUJIFILM BUSINESS INNOVATION CORP.
    Inventors: Daisuke Tomita, Keita Yamamoto, Daisuke Noguchi, Kazuhiko Nakamura, Hiroshi Nakazawa
  • Patent number: 11442393
    Abstract: Described herein is a process for heat transfer printing, the process comprising: electrostatically printing a transparent release composition onto a transfer material to form a release layer disposed on the transfer material; electrostatically printing an electrostatic ink composition on the release layer to form an image layer disposed on the release layer; contacting a thermoplastic film with the image layer; contacting the thermoplastic film with a target substrate under conditions such that the thermoplastic film adheres to the target substrate and the release layer is softened; and separating the target substrate and the transfer material such that the thermoplastic film, image layer and release layer are transferred to the target substrate. A heat transferrable printed image is also described herein.
    Type: Grant
    Filed: October 3, 2018
    Date of Patent: September 13, 2022
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Inna Tzomik, Dima Libster, Katty Noorany, Albert Teishev
  • Patent number: 11314178
    Abstract: A toner containing a toner particle, wherein, when a dielectric loss tangent measured at a frequency of 10 kHz in an impedance measurement on the toner in an environment having a temperature of 50° C. and a relative humidity of 50% RH is designated by tan ?50° C.(1), and a dielectric loss tangent measured at a frequency of 10 kHz in an impedance measurement on the toner in an environment having a temperature of 30° C. and a relative humidity of 50% RH after the impedance measurement on the toner in an environment having a temperature of 50° C. and a relative humidity of 50% RH is designated by tan ?30° C.(2), tan ?50° C.(1) is from 0.015 to 0.050, the relationship tan ?50° C.(1)>tan ?30° C.(2) is satisfied, and tan ?30° C.(2)/tan ?50° C.(1) is from 0.25 to 0.66.
    Type: Grant
    Filed: July 22, 2020
    Date of Patent: April 26, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takashi Kenmoku, Kenta Kamikura, Yuzo Seino
  • Patent number: 11156933
    Abstract: Provided is an image forming method, including: transferring and fixing a toner onto a recording medium, and forming an image including a plurality of layers, in which an attachment amount of the toner on the recording medium is greater than or equal to 8 g/m2 and less than or equal to 40 g/m2, a toner forming a layer in contact with a fixing member contains at least a first mold release agent containing ester wax and a second mold release agent containing microcrystalline wax, and a special color toner is contained in any layer of the plurality of layers.
    Type: Grant
    Filed: April 21, 2020
    Date of Patent: October 26, 2021
    Assignee: KONICA MINOLTA, INC.
    Inventors: Keisuke Asano, Shiro Hirano, Kazuhiko Nakajima
  • Patent number: 10877388
    Abstract: A toner, including a toner particle that contains a binder resin and a release agent, wherein the binder resin contains a polymer A, the polymer A including a first monomer unit derived from a first polymerizable monomer and a second monomer unit derived from a second polymerizable monomer different from the first polymerizable monomer; the first polymerizable monomer is selected from (meth)acrylic acid esters having a C18-36 alkyl group; the toner has a first monomer unit content and a second monomer unit content in the polymer A which are within specific ranges, and assuming that an SP value of the first monomer unit is taken as SP11 and an SP value of the second monomer unit is taken as SP21, the formula (1) below is satisfied, and the molecular weight of the release agent is at least 1,000. 3.00?(SP21?SP11)?25.
    Type: Grant
    Filed: June 12, 2019
    Date of Patent: December 29, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kenji Aoki, Takashi Matsui, Kenta Kamikura, Masao Suzuki, Tsutomu Shimano, Reo Tagawa
  • Patent number: 10859931
    Abstract: A toner having an inorganic fine particle and a toner particle containing a binder resin, wherein the binder resin contains a polymer A having a first monomer unit derived from a first polymerizable monomer and a second monomer unit derived from a second polymerizable monomer that is different from the first polymerizable monomer, the first polymerizable monomer is selected from the (meth)acrylic acid esters each having a C18-36 alkyl group, the content of the first monomer unit in the polymer A is within a specific range, the SP value of the first monomer unit and the SP value of the second monomer unit are in a specific relationship to one another, the inorganic fine particle is surface treated with a compound having an alkyl group, and the volume resistivity of the inorganic fine particle is within a specific range.
    Type: Grant
    Filed: June 12, 2019
    Date of Patent: December 8, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takeshi Hashimoto, Kentaro Kamae, Kazuhisa Shirayama, Hayato Ida, Takashi Matsui
  • Patent number: 10825698
    Abstract: Disclosed are a substrate drying apparatus, a facility of manufacturing a semiconductor device, and a method of drying a substrate. The substrate drying apparatus includes a chamber that is configured to dry a substrate at a first temperature, a first reservoir that is configured to store a first supercritical fluid at a second temperature that is less than the first temperature, a second reservoir that is configured to store a second supercritical fluid at a third temperature that is greater than the first temperature, and a supply unit connected between the chamber and the first reservoir and/or second reservoir. The supply unit is configured to supply the chamber with the first supercritical fluid and second supercritical fluid.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: November 3, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Yong-Jhin Cho, Young-Hoo Kim, Jihoon Jeong, Yungjun Kim, Kuntack Lee
  • Patent number: 10809640
    Abstract: A toner that is suppressed from deteriorating owing to its long-term use and can maintain high transferability. The toner includes: a toner particle containing an amorphous polyester serving as a binder resin and a polymer A; and inorganic fine particles, wherein the polymer A includes a graft copolymer of a polyolefin and a vinyl-based polymer unit having a carboxylate anion group, and a metal ion having a valence of 2 or more.
    Type: Grant
    Filed: August 26, 2019
    Date of Patent: October 20, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yosuke Iwasaki, Kenta Mitsuiki, Wakiko Katsumata, Takeshi Ohtsu, Masaharu Miura, Koh Ishigami, Takakuni Kobori, Takaho Shibata, Daisuke Yamashita, Hitoshi Sano, Ryo Nakajima, Rei Hijikawa, Yuichi Mizo
  • Patent number: 10597494
    Abstract: A salt composition includes at least one ammonium carboxylate salt obtained from: (a) at least one aromatic compound comprising 2 anhydride functional groups and/or its carboxylic acid and/or ester derivatives; and (b) one or more aliphatic diamines in which said aliphatic diamine or diamines are chosen from the diamines of formula (I) NH2—R—NH2 with R being a saturated aliphatic divalent hydrocarbon radical, the two amine functional groups of which are separated by 4 to 6 carbon atoms and 1 or 2 hydrogen atoms of the divalent radical of which are replaced by 1 or 2 methyl and/or ethyl groups; and optionally the diamines of formula (II) NH2—R?—NH2 with R? being a saturated or unsaturated and aliphatic, cycloaliphatic or arylaliphatic divalent hydrocarbon radical, which optionally comprises heteroatoms; and at least one chain-limiting compound chosen from monoamines, monoacids or diacids in the ?,? positions.
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: March 24, 2020
    Assignee: Rhodia Operations
    Inventor: Stéphane Jeol
  • Patent number: 10578990
    Abstract: A toner comprising a toner particle that contains a binder resin and a colorant, wherein (1) an average circularity of the toner is at least 0.960, (2) an onset temperature T? (° C.) of a storage elastic modulus E? of the toner, as determined by a powder dynamic viscoelastic measurement, is from 50° C. to 70° C., and (3) in a differential curve obtained by differentiation, by load, of a load-displacement curve provided by measurement of the strength of the toner by a nanoindentation procedure, with the horizontal axis being load (mN) and the vertical axis being displacement (?m), the load X that provides the maximum value in the differential curve in the load region from 0.20 mN to 2.30 mN is from 1.00 mN to 1.50 mN.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: March 3, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Shohei Tsuda, Daisuke Yoshiba, Kozue Uratani, Mariko Yamashita
  • Patent number: 10365571
    Abstract: An electrostatic latent image developing toner includes a plurality of toner particles containing a non-crystalline polyester resin and a crystalline polyester resin. The toner particles contain as the crystalline polyester resin a dispersoid of crystallized crystalline polyester resin (CPES) domains. The CPES domains of the CPES dispersoid have an aspect ratio of at least 3.40 and no greater than 10.0 in terms of number average value. The toner particles have a roundness of at least 0.950 and no greater than 0.970 in terms of number average value. In a cross-sectional image of each of the toner particles, a ratio of a total area occupied by the CPES dispersoid to a cross-sectional area of the toner particle is at least 10.0% and no greater than 30.0%. The non-crystalline polyester resin includes a repeating unit derived from alkenyl succinic anhydride. The crystalline polyester resin includes a repeating unit derived from n-butyl methacrylate.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: July 30, 2019
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Toshiki Takemori, Kohei Yamauchi
  • Patent number: 10357963
    Abstract: A printing process is disclosed which comprises directing droplets of an ink onto an intermediate transfer member to form an ink image, the ink including an organic polymeric resin and a coloring agent in an aqueous carrier, and the transfer member having a hydrophobic outer surface so that each ink droplet in the ink image spreads on impinging upon the intermediate transfer member to form an ink film. The ink is dried while the ink image is being transported by the intermediate transfer member by evaporating the aqueous carrier from the ink image to leave a residue film of resin and coloring agent. The residue film is then transferred to a substrate.
    Type: Grant
    Filed: September 19, 2017
    Date of Patent: July 23, 2019
    Assignee: LANDA CORPORATION LTD.
    Inventors: Benzion Landa, Yehoshua Sheinman, Sagi Abramovich, Galia Golodetz, Gregory Nakhmanovich, Meir Soria
  • Patent number: 10234777
    Abstract: A toner is provided, which is obtained by heat treating a toner particle containing a crystalline polyester resin, an amorphous polyester resin, a hydrocarbon wax and a wax dispersant, wherein the crystalline polyester resin is a hybrid resin having crystalline polyester segments and amorphous vinyl segments, and a mass ratio of crystalline polyester segments and amorphous vinyl segments in the crystalline polyester resin (crystalline segments/amorphous segments) is 70/30 to 98/2.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: March 19, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takeshi Ohtsu, Kentaro Kamae, Ryuichiro Matsuo, Yosuke Iwasaki, Wakiko Katsumata, Kenta Mitsuiki, Masaharu Miura, Koh Ishigami, Yuichi Mizo
  • Patent number: 10234779
    Abstract: A toner includes a toner particle containing a resin component containing an olefin copolymer, wherein the olefin copolymer includes a specific monomer unit Y1 and a specific monomer unit Y2, and the content of the olefin copolymer in the resin component is more than 50 mass % based on the total mass of the resin component, and the olefin copolymer has a melting point of 80° C. or more and 150° C. or less.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: March 19, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hayato Ida, Junichi Tamura, Ryuji Murayama, Takaho Shibata, Daisuke Yamashita, Takashi Hirasa
  • Patent number: 10226256
    Abstract: This invention relates in one aspect to the treatment of a vascular vessel with a biomaterial. The biomaterial can be a remodelable material that strengthens and/or supports the vessel walls. Additionally the biomaterial can include a variety of naturally occurring or added bioactive agents and/or viable cellular populations.
    Type: Grant
    Filed: February 4, 2014
    Date of Patent: March 12, 2019
    Assignees: Cook Medical Technologies LLC, Cook Biotech Incorporated
    Inventors: Brian C. Case, Jacob A. Flagle, Michael C. Hiles, Umesh H. Patel, F. Joseph Obermiller
  • Patent number: 10195843
    Abstract: A printing system and method are provided. The printing system includes an image forming station for temporarily deposit an image on an intermediate transfer member when the intermediate transfer member in the image forming station is in a first temperature range. The system further includes a drying station configured to increase a temperature of the intermediate transfer member from a first temperature in the first temperature range to a second temperature in a second temperature range, the second temperature being substantially higher than the first temperature. The system further includes an impression station configured to transfer the temporarily deposited image from the intermediate transfer member onto a substrate when the intermediate transfer member in the impression station is in the second temperature range. The system further includes a cooling station for retaining a coolant configured to revert the intermediate transfer member to a temperature in the first temperature.
    Type: Grant
    Filed: August 11, 2017
    Date of Patent: February 5, 2019
    Assignee: LANDA CORPORATION LTD
    Inventors: Benzion Landa, Yehoshua Sheinman, Sagi Abramovich, Galia Golodetz, Gregory Nakhmanovich, Meir Soria
  • Patent number: 10151991
    Abstract: Provided is a toner including at least: a binder resin; and a release agent, wherein in a transmission electron microscopic (TEM) image of a torn cross-section of the toner, the release agent has an acicular or filiform shape and an average aspect ratio of 31 or greater, and wherein a displacement amount of the toner when 250 micronewtons is applied to the toner in a microcompression test is 700 nm or less.
    Type: Grant
    Filed: August 14, 2017
    Date of Patent: December 11, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Satoshi Kojima, Yoshihiro Moriya, Masahiko Ishikawa, Satoshi Takahashi, Tatsuru Moritani, Tatsuki Yamaguchi
  • Patent number: 10101681
    Abstract: Provided is a toner having a toner particle containing a binder resin and a wax, wherein the wax concentrations near the outermost surface of the toner and in the surface layer region below the outermost surface are controlled, so that the wax moves with high efficiency to near the outermost surface during heating.
    Type: Grant
    Filed: March 30, 2017
    Date of Patent: October 16, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Reo Tagawa, Yoshihiro Nakagawa, Naoya Isono, Harumi Takada
  • Patent number: 10073366
    Abstract: A toner is provided. The toner includes an amorphous resin, a crystalline resin dispersed in the amorphous resin, and a release agent. The toner satisfies the following inequality: B/A<0.8 where A represents a perimeter of the crystalline resin and B represents a length of a part of the perimeter A of the crystalline resin at which the crystalline resin is in contact with the amorphous resin, A and B being measured from a cross-sectional image of the toner observed with transmission electron microscope.
    Type: Grant
    Filed: June 14, 2017
    Date of Patent: September 11, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Kohsuke Nagata, Ryuuta Yoshida, Shinya Nakayama, Tsuyoshi Sugimoto, Akinori Saitoh, Hideyuki Santo, Suzuka Karato, Koh Ohnuma, Takahiro Kadota, Shinsuke Nagai, Akihiro Takeyama
  • Patent number: 9996019
    Abstract: Disclosed are cold pressure fix toner compositions that include a core of a colorant, and a mixture of a co-polyester-co-polydimethylsiloxane and an amorphous resin, and a polymer shell thereover.
    Type: Grant
    Filed: March 3, 2017
    Date of Patent: June 12, 2018
    Assignee: Xerox Corporation
    Inventors: Yulin Wang, Guerino G. Sacripante, Richard P. N. Veregin, Edward G. Zwartz, Kathryne S. Brockman
  • Patent number: 9964885
    Abstract: An electrostatic charge image developing toner includes a plurality of toner particles. Each of the plurality of toner particles includes a toner core and a shell layer covering the toner core. The shell layer contains a thermosetting resin. A content ratio of a toner component insoluble in tetrahydrofuran is at least 90 mass % relative to mass of the toner. Melt viscosity of the toner at 75° C. is at least 1.0×104 Pa·s and no greater than 1.0×105 Pa·s. The thermosetting resin is preferably a melamine resin or a urea resin. The toner core preferably contains a binder resin, and the binder resin has a softening point (Tm) of at least 85° C. and no greater than 95° C.
    Type: Grant
    Filed: February 10, 2015
    Date of Patent: May 8, 2018
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Sho Sumioka
  • Patent number: 9904193
    Abstract: Provided is a toner, including a toner particle containing: a binder resin containing a styrene acrylic resin as a main component, a colorant, a hydrocarbon wax, and a wax dispersant, in which: the wax dispersant includes a polymer of a vinyl resin component and a hydrocarbon compound, the vinyl resin component including styrene and one or more kinds of vinyl-based polymerizable monomers except a styrene derivative; and a solubility parameter of the binder resin (A) a solubility parameter of the vinyl resin segment of the wax dispersant (C), and a solubility parameter of the hydrocarbon compound segment of the wax dispersant (D) satisfy the formulae (1) and (2). |A?C|?0.20??(1) C?D<1.
    Type: Grant
    Filed: June 30, 2016
    Date of Patent: February 27, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yoshihiro Nakagawa, Masatake Tanaka, Naoya Isono, Harumi Takada
  • Patent number: 9864287
    Abstract: An electrostatic charge image developing toner includes kneaded and pulverized toner particles that contain a binder resin and a release agent, the release agent being partially exposed, and an external additive that contains silica particles having a compression aggregation degree of from 60% to 95% and a particle compression ratio of from 0.20 to 0.40.
    Type: Grant
    Filed: July 26, 2016
    Date of Patent: January 9, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Yoshifumi Iida, Hiroyoshi Okuno, Satoshi Inoue, Tomohito Nakajima, Yuka Zenitani, Yoshifumi Eri, Takeshi Iwanaga, Sakae Takeuchi, Shunsuke Nozaki, Yasuo Kadokura, Yasuhisa Morooka
  • Patent number: 9864288
    Abstract: A toner set includes a brilliant toner including a brilliant pigment; and a chromatic toner including a coloring agent that is different from the brilliant pigment, wherein the toner set satisfies the following expression: 1.2?Q1/Q2?5.0 wherein Q1 represents an endothermic quantity of the brilliant toner and Q2 represents an endothermic quantity of the chromatic toner.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: January 9, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Shotaro Takahashi, Atsushi Sugitate, Masaru Takahashi, Sakiko Hirai, Satomi Hara
  • Patent number: 9798261
    Abstract: The present disclosure relates to a chemically prepared toner composition including a toner particle having a core including a first polymer binder, an styrene acrylate encapsulated wax latex, a pigment, and a shell formed around the core including a second polymer binder and method to make the same. The disclosed method of preparing the toner results in a change in the distribution of the components of the toner particle wherein the lower molecular weight resins, the pigment, and the wax are located away from the surface of the toner particle and the pigment is clinging to the edge of the wax domain.
    Type: Grant
    Filed: November 10, 2015
    Date of Patent: October 24, 2017
    Assignee: LEXMARK INTERNATIONAL, INC.
    Inventors: Jing X Sun, Cory Nathan Hammond
  • Patent number: 9785068
    Abstract: The toner has a toner particle that contains a binder resin and a wax, wherein the wax is present in domain form in the interior of the toner particle; the proportion of toner particles for which the position of the wax domains are controlled, is in a prescribed range; using d for a major axis length of the domain having the largest major axis length and using D for a number-average particle diameter of the toner, the d and D satisfy a prescribed relationship; and the ratio between the major axis length and the minor axis length of the domain having the largest major axis length is in a prescribed range.
    Type: Grant
    Filed: August 24, 2016
    Date of Patent: October 10, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Noriyoshi Umeda, Takeshi Kaburagi, Naotaka Ikeda, Hirofumi Kyuushima, Shohei Shibahara, Yoshiaki Wada
  • Patent number: 9733582
    Abstract: The present disclosure relates to a chemically prepared toner composition including a toner particle having a core including a first polymer binder, an styrene acrylate encapsulated wax latex, a pigment, and a shell formed around the core including a second polymer binder and method to make the same. The disclosed method of preparing the toner results in a change in the distribution of the components of the toner particle wherein the lower molecular weight resins, the pigment, and the wax are located away from the surface of the toner particle and the pigment is clinging to the edge of the wax domain.
    Type: Grant
    Filed: November 10, 2015
    Date of Patent: August 15, 2017
    Assignee: LEXMARK INTERNATIONAL, INC.
    Inventors: Jing X Sun, Cory Nathan Hammond
  • Patent number: 9671708
    Abstract: An electrostatic charge image developing toner includes a toner particle that has a sea-island structure including a sea portion containing a binder resin and an island portion containing a release agent and having at least two maximum values of distribution of a degree of uneven distribution B of the island portion shown by the following Equation (1): degree of uneven distribution B=2d/D??Equation (1) in Equation (1), D represents an equivalent circle diameter (?m) of the toner particle obtained by cross section observation of the toner particle, and d represents a distance (?m) between the center of gravity of the toner particle and the center of gravity of the island portion containing the release agent obtained by cross section observation of the toner particle.
    Type: Grant
    Filed: May 13, 2015
    Date of Patent: June 6, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Kana Yoshida, Atsushi Sugawara, Tsuyoshi Murakami, Yukiaki Nakamura
  • Patent number: 9651883
    Abstract: A toner comprising a toner particle containing an amorphous polyester resin, a crystalline polyester resin and a wax, wherein in a cross-section of the toner by transmission electron microscopy (TEM), domains of the wax and crystals of the crystalline polyester resin are present, the area occupied by the domains of the wax is 0.5% to 8.0% and the area occupied by the crystals of the crystalline polyester resin is 0.5% to 8.0% of the cross-sectional area of the toner, the number-average diameter Dw of the domains of the wax is 60 nm to 240 nm, the aspect ratio of the crystals of the crystalline polyester resin is 5.0 to 25.0, and the number-average diameter Dc of major axis lengths of the crystals of the crystalline polyester resin is 0.8 to 2.0 times the Dw.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: May 16, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Masayuki Hama, Ichiro Kanno, Takeshi Hashimoto, Nozomu Komatsu, Takakuni Kobori, Hiroyuki Fujikawa
  • Patent number: 9625840
    Abstract: A process for making a latex emulsion suitable for use in a toner composition includes co-emulsifying a bio-based resin with an insoluble component, such as a pigment or wax, whereby the resin encapsulates the insoluble component. The resulting latex, including the insoluble component encapsulated in the resin, may then be utilized to form a toner. The insoluble component may thus be included in toner particles, which might otherwise be difficult to achieve, using emulsion aggregation processes.
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: April 18, 2017
    Assignee: Xerox Corporation
    Inventors: Ke Zhou, Kimberly D Nosella, Guerino Sacripante, Sonja Hadzidedic
  • Patent number: 9625847
    Abstract: An electrostatic charge image developing carrier contains a core particle and a resin coat layer on a surface of the core particle, wherein the core particle has a BET specific surface area of from 0.05 m2/g to 0.10 m2/g, and the resin coat layer contains a nitrogen-containing (meth)acrylate resin.
    Type: Grant
    Filed: January 23, 2015
    Date of Patent: April 18, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Takeshi Shoji, Hiroshi Kamada, Yosuke Tsurumi
  • Patent number: 9612543
    Abstract: Toner for developing electrostatic images including core particles that contain a colorant, a binder resin, and a wax, and exhibiting low-temperature fixability, high-temperature anti-offset property, image durability, flowability, high-temperature preservability, and low particle emission rate.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: April 4, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hae-ree Joo, Yo-da Shin, Seung-jun Lee
  • Patent number: 9606465
    Abstract: Provided are a propylene-based polymer useful for providing a toner that is excellent in offset resistance, can be fixed by using a low-temperature heating element and hardly has stickiness even after stored for a long period of time; and a toner including said propylene-based polymer. The present invention is directed to a propylene/?-olefin copolymer (A) which includes 60 to 90 mol % of structural units derived from propylene (a) and 10 to 40 mol % of structural units derived from ?-olefins having 4 or more carbon atom (b) wherein (a)+(b)=100 mol % and which satisfies: (i) a weight average molecular weight (Mw) as measured by GPC of 3,000 to 40,000; (ii) a melting point (Tm) as measured by DSC of 60 to 90° C.; and (iii) a half width of a crystalline melting point peak as measured by DSC of 1 to 20° C.
    Type: Grant
    Filed: March 22, 2013
    Date of Patent: March 28, 2017
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Kuniaki Kawabe, Hirotaka Kanaya, Toshiyuki Ito, Kan Komiya
  • Patent number: 9594322
    Abstract: A toner is provided. The toner includes a crosslinked polyester resin, and a block copolymer. The crosslinked polyester resin includes a diol component, which includes an aliphatic diol component having 3 to 10 carbon atoms in an amount of 50% by mole, and a crosslinked component, which is at least one of a crosslinked component of an aliphatic alcohol having three or more valences and a crosslinked component of an aliphatic acid having three or more valences, and the block copolymer includes a crystalline segment (a) and a non-crystalline segment (b). The toner has a first glass transition temperature (Tg1st) of from 20° C. to 50° C., which is determined by subjecting the toner to differential scanning calorimetry (DSC) and measuring a glass transition temperature in a first temperature rising process in the differential scanning calorimetry (DSC).
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: March 14, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Suzuka Amemori, Tsuyoshi Sugimoto, Akinori Saito, Toyoshi Sawada, Keiji Makabe
  • Patent number: 9482973
    Abstract: A toner is provided. The toner includes a binder resin and a release agent. The toner satisfies the following inequation: 0.45?(S1/S2)?1.00 wherein S1 and S2 represent areas of quadrangles circumscribing the release agent and the toner, respectively, in a cross-sectional image of the toner obtained by a transmission electron microscope (TEM).
    Type: Grant
    Filed: February 25, 2015
    Date of Patent: November 1, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Ryota Inoue, Yoshihiro Moriya, Masahiko Ishikawa, Satoshi Takahashi, Tatsuki Yamaguchi
  • Patent number: 9459546
    Abstract: A toner to develop electrostatic latent images which uses an appropriate combination of a high molecular weight binder resin and a low molecular weight binder resin, an appropriate amount of a releasing agent, and a combination of silica particles and iron oxide particles as external additives, and thus has the following effects: the toner may reduce a generation amount of ultra-fine particles (UFPs) and have enhanced fluidity, charging uniformity, charging stability, transfer efficiency, fixability, durability and a cleaning ability.
    Type: Grant
    Filed: December 30, 2013
    Date of Patent: October 4, 2016
    Assignee: SAMSUNG ELECTRONICS, CO., LTD.
    Inventors: Se-young Yoon, Sung-jin Park, Hong-chul Shin, Seung-sik Woo, In-su Lee
  • Patent number: 9381736
    Abstract: A printing process is disclosed which comprises directing droplets of an ink onto an intermediate transfer member to form an ink image, the ink including an organic polymeric resin and a coloring agent in an aqueous carrier, and the transfer member having a hydrophobic outer surface so that each ink droplet in the ink image spreads on impinging upon the intermediate transfer member to form an ink film. The ink is dried while the ink image is being transported by the intermediate transfer member by evaporating the aqueous carrier from the ink image to leave a residue film of resin and coloring agent. The residue film is then transferred to a substrate.
    Type: Grant
    Filed: March 5, 2013
    Date of Patent: July 5, 2016
    Assignee: LANDA CORPORATION LTD.
    Inventors: Benzion Landa, Yehoshua Sheinman, Sagi Abramovich, Galia Golodetz, Gregory Nakhmanovich, Meir Soria
  • Patent number: 9366981
    Abstract: A toner which includes a binder resin, a colorant and a hydrocarbon wax has a ratio W1/W2 of the half width W1 (° C.) of a endothermic peak derived from melting of the hydrocarbon wax in a first temperature rise process on the toner to the half width W2 (° C.) of a endothermic peak derived from melting of the hydrocarbon wax in a second temperature rise process, as measured with a differential scanning calorimeter, with the ratio W1/W2 being not less than 0.50 and not more than 0.90.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: June 14, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kentaro Yamawaki, Takeshi Tsujino, Hidekazu Fumita, Nobuhisa Abe, Junya Asaoka
  • Patent number: 9323166
    Abstract: The present invention addresses the problem of providing an electrophotographic toner which has excellent storage property, is excellent in offset resistance and low-temperature fixing property during printing and has few substances causing staining with time, odor or dust inside a copy machine or a printer. The present invention relates to an electrophotographic toner characterized by containing an ethylene copolymer which comprises a constituent unit (a) derived from ethylene in an amount of 80 to 99.5% by mol and a constituent unit (b) derived from a cyclic olefin of 8 or more carbon atoms in an amount of 0.5 to 20% by mol [(a)+(b)=100% by mol] and satisfies the requirements: (i) the intrinsic viscosity [?] is in the range of 0.01 to 0.50 dl/g, and (ii) the crystallinity is in the range of 50 to 90%.
    Type: Grant
    Filed: March 22, 2013
    Date of Patent: April 26, 2016
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Kuniaki Kawabe, Masakazu Tanaka, Hiroshi Matsuoka, Noriko Kai, Keiichi Taki
  • Patent number: 9304420
    Abstract: A two-component developer is provided. The two-component developer includes a toner containing a binder resin, a colorant and a release agent, and a resin-coated carrier composed of a carrier core material and a resin coating layer formed on a surface of the carrier core material. The toner has an exposure rate of the release agent on the toner surface of 1.00% or above and 3.07% or below. The carrier core material has an apparent density of 1.86 g/cm3 or more and 2.45 g/cm3 or less. The exposure rate of the release agent of the toner and the apparent density of the carrier core material satisfy the following formula (1): y??1.54x+5.93??(1) wherein y represents the exposure rate of the release agent of the toner, and x represents the apparent density of the carrier core material.
    Type: Grant
    Filed: July 13, 2010
    Date of Patent: April 5, 2016
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Nobuyuki Yoshioka, Takanori Kamoto, Osamu Wada, Tadashi Iwamatsu
  • Patent number: 9256148
    Abstract: A toner having toner particles, each of which contains a binder resin, a wax and inorganic fine particles, wherein the inorganic fine particles are fixed at the surface of the toner particles as a result of a surface treatment by hot air, and the degree of uneven distribution of wax in the toner is controlled in a depth direction of the toner, from the toner surface towards a toner central portion.
    Type: Grant
    Filed: November 24, 2011
    Date of Patent: February 9, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Hiroyuki Fujikawa, Kunihiko Nakamura, Nozomu Komatsu, Kosuke Fukudome, Yoshiaki Shiotari, Takayuki Itakura
  • Patent number: 9195155
    Abstract: A method for preparing toner particles is disclosed. In embodiments, a suitable method includes aggregating a mixture comprising at least one resin, an optional pigment and an optional wax to form aggregated particles, freezing aggregation of particles by adjusting the pH of the aggregated particles to a freezing aggregation pH; coalescing the aggregated particles to form toner particles at a first pH that is higher than the freezing aggregation pH; and recovering the toner particles.
    Type: Grant
    Filed: October 7, 2013
    Date of Patent: November 24, 2015
    Assignee: XEROX CORPORATION
    Inventors: Ke Zhou, Guerino G. Sacripante, Yulin Wang, Abdisamed Sheik-Qasim, Rashid Mahmood, Rosa Duque
  • Patent number: 9141011
    Abstract: A method for producing a toner for electrostatic image development including the step of melt-kneading a mixture containing a resin binder and a wax, wherein the resin binder contains an amorphous polyester (A) obtained by polycondensing an alcohol component containing an aliphatic diol (a) having 3 or 4 carbon atoms, the aliphatic diol having a hydroxyl group bonded to a secondary carbon atom, and an aliphatic diol (b) containing one or more ?,?-linear alkanediols having 2, 4, 6 or 8 carbon atoms, and a carboxylic acid component. The toner for electrostatic image development can be suitably used in, for example, the development or the like of latent image formed in an electrostatic development method, an electrostatic recording method, an electrostatic printing method, or the like.
    Type: Grant
    Filed: October 4, 2013
    Date of Patent: September 22, 2015
    Assignee: Kao Corporation
    Inventors: Shogo Watanabe, Takeshi Ashizawa, Takashi Kubo, Norihiro Hirai
  • Patent number: 9141012
    Abstract: The toner includes toner particles containing a polyester resin A, a polyester resin B and a colorant, the polyester resin A has a polyester portion including a segment capable of forming a crystal structure and a crystal nucleating agent segment, which is bonded to an end of the polyester portion, and the polyester resin B is a resin which is free of any segments capable of forming a crystal structure, the polyester resin B has a weight average molecular weight Mwb by GPC of a THF soluble matter of 3000 or more and 100000 or less, and an SP value Sa ((cal/cm3)1/2) of the polyester portion of the polyester resin A and an SP value Sb ((cal/cm3)1/2) of the polyester resin B satisfy the following relationships: 9.00?Sa?10.50 ?0.40?Sb?Sa?0.80.
    Type: Grant
    Filed: December 12, 2013
    Date of Patent: September 22, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Shuhei Moribe, Kosuke Fukudome, Satoshi Mita, Kazuo Terauchi, Yojiro Hotta, Tetsuya Ida
  • Patent number: 9134636
    Abstract: An electrostatic charge image developing toner includes a binder resin and a release agent, and when a peak temperature during a first temperature increase and a peak temperature during a second temperature increase, that are obtained by differential scanning calorimetry including performing the first temperature increase at 10° C./min after holding at 10° C., performing cooling at ?10° C./min, performing a heat treatment for 24 hours at 50° C., and performing the second temperature increase at 10° C./min, are represented by Tt1 and Tt2(50° C.), respectively, the following Expression (1) is satisfied: Tt1<Tt2(50° C.).
    Type: Grant
    Filed: September 13, 2013
    Date of Patent: September 15, 2015
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Tetsuya Taguchi, Satoshi Yoshida, Shinya Nakashima, Shinya Sakamoto, Kosaku Yoshimura, Emi Miyata
  • Patent number: 9122181
    Abstract: A toner for developing an electrostatic charge image, including toner particles obtained by dissolving or dispersing a binder resin and an additive in an organic solvent to prepare an oil phase component, and dispersing and granulating the oil phase component in an aqueous medium containing an inorganic dispersant dispersed therein, wherein the binder resin is a polyester resin obtained from an alcohol component, a carboxylic acid component, and a long-chain alkyl group represented by formula (1), the long chain alkyl group being present in a mole percent ranging from 6.5 to 7.5 mol % based on total number of moles of the alcohol component, the carboxylic acid component, and the long-chain alkyl group, and the polyester resin having an acid value of from 4.9 to 7.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: September 1, 2015
    Assignee: Oki Data Corporation
    Inventor: Manami Hiraide
  • Patent number: 9116450
    Abstract: A toner including a petroleum wax, wherein the petroleum wax comprises a paraffin wax having a polarity.
    Type: Grant
    Filed: September 20, 2011
    Date of Patent: August 25, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Masato Iio, Kentarou Matsumoto, Shinya Kobayashi, Akio Tsujita, Katsuhiro Shinohara, Tadashi Kasai, Masakazu Terao, Tsuyoshi Asami
  • Patent number: 9029059
    Abstract: A process for making a latex emulsion suitable for use in a toner composition includes co-emulsifying a bio-based resin with an insoluble component, such as a pigment or wax, whereby the resin encapsulates the insoluble component. The resulting latex, including the insoluble component encapsulated in the resin, may then be utilized to form a toner. The insoluble component may thus be included in toner particles, which might otherwise be difficult to achieve, using emulsion aggregation processes.
    Type: Grant
    Filed: April 8, 2011
    Date of Patent: May 12, 2015
    Assignee: Xerox Corporation
    Inventors: Ke Zhou, Kimberly D. Nosella, Guerino G. Sacripante, Sonja Hadzidedic
  • Patent number: 9029057
    Abstract: Emulsion aggregation toner comprising: a resin; a wax; a colorant; an encapsulating shell; and a silica external additive comprising: first silica particles comprising fumed silica particles surface treated with octyldimethylsiloxane and having average particle diameter about 6-20 nm, present in amount of about 0.1-1% by weight of the toner; second silica particles comprising colloidal silica particles surface treated with hexamethyldisiloxane and having average particle diameter about 80-200 nm, present in amount of about 1-2% by weight of the toner; third silica particles comprising fumed silica particles surface treated with polydimethylsiloxane and having average particle diameter about 25-65 nm, present in amount of from about 0.5-1.5% by weight of the toner; and fourth silica particles comprising fumed silica particles surface treated with hexamethyldisiloxane and having average particle diameter about 25-65 nm, present in amount of about 1-2.5% by weight of the toner.
    Type: Grant
    Filed: April 17, 2013
    Date of Patent: May 12, 2015
    Assignee: Xerox Corporation
    Inventors: Grazyna E. Kmiecik-Lawrynowicz, Maura A. Sweeney, Samir Kumar, Daniel W. Asarese
  • Patent number: 9012113
    Abstract: White toner contains a binder resin, a white pigment, and a releasing agent, wherein the white pigment is coated with the releasing agent and dispersed in the binder resin.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: April 21, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Kazumi Suzuki, Tatsuya Morita, Yoshitaka Yamauchi, Masana Shiba, Azumi Miyaake